(b) the minimum wavelength of X-rays produced by 30 kV electrons. 2. The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted? 3 ...

This article will help students get the sample paper for CBSE class 12th Physics board exam which is scheduled for 20th February 2026. The sample paper includes important questions and solutions which ...

If you are worried and want to know how to fast-track and give the final push to your preparation, here are some suggestions on important topics, formulas, high-weightage units, along with what you ...